Convertirle swimming pool and skating rimk



July 18, 1933- H. TORRANCE CONVERTIBLE SWIMMING POOL AND SKATING RINK 6 Sheets-Sheet l INVENTOR Henry Torrazwe \w mm m L a, I In v H AN 5i T QN BY f g I IM "M ATTORNEYS ALM,

July 18, 1933. H ToRRANcE CONVERTIBLE SWIMMING POOL'AND SKATING RINK Filed Spt. 12, 1952 6 Sheets-Sheet 2 -4 L .fiL'

INVENTOR 10y Zarrwzae BY AW/ W m. ATTORNEYS July 18, 1933. 1,918,437

H. TORRANCE CONVERTIBLE SWIMMING POOL AND SKATING RINK Filed Sept. 12, 1932 6 SheetsSheet 3 ATTORNEY July 18, 1933.

H.TORRANCE CONVERTIBLE SWIMMING POOL AND SKATING RINK Filed Sept. 12, 1932 6 Sheets-Sheet 4 ATToNEYs H. TORRANCE July 18, 1933.

CONVERTIBLE SWIMMING POOL AND SKATING RINK 1932 6 Sheets-Sheet 5 Filed Sept. 12

INVENTOR Hezzzy Torrance BY ATTORNEYS July 18, 1933. TQRRANCE 1,918,437

CONVERTIBLE SWIMMING POOL AND SKATING RINK Filed Sept. 12, 1932 6 Sheets-Sheet 6 \NVENTOR Henry Torrance ATTORNEYS Patientedpjuly 18,

i Onsobpcti of,

c01stirlil i iifiiiiiiiswiiimms1 091,, 5; -Ap licationnlemse tembef-izi193a .seiml myeggmsz- Tbsrdinaryswimmipg P 01 is; entirely ontlqfuse in: thswintertime, and, theoraiinalgy skating rink is entirely. ,out l fi ,use ms the: S DIImBFti-I ZIIBA Y provider, m construction which m zy be; selep tiyeliy' convsrmd into. a, swimm ngppool on skan'sig rink in; a, comguati'velyt ;short t1me-,

and-mitlmut any isubstant iai ChflllgQiJLBQgliPg w iw m i t a m n wfwc m tinnous service. e usuql qutfiopn swim-g minrg pool is. at least. as large as ltl e-u s ualv ice-:3

skgtingrink. {These sin-ks a m'nearly fli wa yrs oii' a, suitablelfor heckey games and may measnm appnoximately 10.0 feet] by1200flfaetnT h-is invention. ;1s1 more specially; adagted;

61. :thfilfifgl? 0913 although the smallpoals in; 2 1.; qaulda also be; adyantsgegusly eqpipp ed with my; im gnnipnn for ordinary skadiigg im'the Winter 1 us l V substantially ceveringggtghe 0111351116; floor there-'- of. "and usually v compnisesi a sales ozfi PIPES V running; hsngthwdse 01 1,0110 ss-v vr-isav 'tharink hetween headla rsr Tomonyertfih tyw' .s a n nkmw w mmm r p001 w0uld-,= neeessibate; thaammom-L of: these milk, It, is, obvieus that sucbmmov alr would flbor of the pool and then the-aplategmpmited,

andi expensel E irthenma'rey the problemv 0i plates, Igvsuch a cqnstnuqtiox ti 1e supporting lstructum muss, firsb berabuiltnupsnr the on, ,sucha sstriuc tm eg Ln this summer? in nder m recignviept theQpilr into, a, swimming pppl it. is -necessqry t I removes: gsiipgorgting strucui;e-.- fi mhamconstrmctioni entaglsg;

,Thepnesent i-nvgntion incliids' a, floating mgnsntly carries meagas i n ineezing a? layer 0i waten ontlie t-opr thereoiw In the summen,

when it 1sagg1m desired to useithe; pit- 01; a

Yo m1KLm 4SSIGi Im-ucx Er nm or magma; rmuswmmmi v A communion n,rmsn.vm 1g mm nggpooli, is flMtinQBQOrLiSQQ R V s reisdw inwge uslyprowidedysuhgJf "The floating flbof, if-desired, may befma'tldr i Whit n mel sunny other: qolnnito' v matchthe{colon1qfthe sides :ofi the; pit smthah Willi lie present when. th'pibsis-gconvenfiedsintm a-swimmingpooh I In. (me; mbd'msnfigofi m inventiongizthek fipvatingi floov m yvtake ther osmwfi mwmn-gi tightsponmon Of sufligilept, d'epithmo take-bares f? dead and? liv loadsmvhefi se' ska'tin-g- -;-fi'e@12, Fem;1211: 11 pimpcnegmtg appnox imafiely 1&1 "to 1: 1.24 ditches deph Thei imbinnof; the paritoongcarnisimfiiiggmting simd t9 use ithaspihffbn' a: swimming vpawlgs.

the water is pumped-ioutjmi th intenion'foff grating means. Thssggdflsimaysbg f '1 mgiyibivss 3 to the bottom ofthe plate or may be mounted on top of theplate andcovered by a thin metal sheet so a's'to present a smooth surface when the pan is sunk. If a concreteslabis" employed, the refrigerating conduit may] be embedded; therein and forma rust-proof con- .5:: pan-and water pumped into the bottom of the struction therewith. In the summer, the pan rests on the bottom of the pit,*suitable molding being provided to cover thegap between the edge of the pan and the sideof the pit when in this position; In thewinter, when it is desired to raise the pan'to form a skating floor, the molding is removed, the

water isdrawn out oft-he pit from abovethe pan to float the pan towards thetop of the pit.' If desired, the molding may be permanently attached to theedgesofthe'pan;

The bottom of the floating floor maybe insulated 'if'desired, but it would generally be preferred that such insulation need not be provided since it would be advantageous to havea layer of water frozen below the hottomof the floating floor. Thus, if it were ossible to free s'aythreeinches of water beow the bottom of the floating floor, it, would help support the pan and would at the same I timezstore a ,certain amountiof refrigeration- 1 which wlllald 1n maintaining the lee-skat ng surface; I p I r The panmust have enough buoyancy to support the weight of the skates as well as its own weight: and the weight of the refrigerat" ing systemxconnected"thereto. It must also have enough buoyancy so thatifbyflany chance/many of the skaters} would congre I gateson' .onesideof the pool: ;.tl1ere would be nodanger of sinkingthe pan. In the usual constructions, the-sides of the pan are sufii-' cientlyhigh'to' amply take care of any live load" on: the floating" surface. However,- if

I desired,-additional precaution maybe taken to preventany unusual conditions which may causelthe floating fioor to d angero'usly tilt.

For that purpose, itis'advisable in some constructions tojinstallsome means such as movable swinging-supports at the edge of the pit, Which woiuld'swing' over to take the weight from the edges of the floatingfioor in case tooijmany people-congregate at one edge of the floor. Thesetemporary emergency supports'm'ight be stir-rups suspended from the sides of the pit and attached to the floating; I floor,'or might be in the. form of horizontal sliding beams which can be moved out to engagethe pan. An advantageous-and desirable construction for this purpose, includes a I flange membergdetacha'bly connected to the floating fioor and extending outwardly from the side of the floornear the top thereof and above "the'walk' around the pit. These members are adapted toengage the walk when sunk-too'low and preventthe floorfr om'be ingsubme'rged, In the summer, these flange members may be removed. Anysimilar is shallow,

tions may be hinged together.

ready in existence withoutmaterial change the municipal or otheri'authorit'ies: to prevent the sinking of the floating floor."

This condition is highly desirable in skating rinks in ordert'o keep alayer 'of'cold air.

above the skatingfloor and protect said layer against horizontal drafts of hot air. v At the endof the skating season, the water may be drawn out of the pit and the pan sunk" emergency device may be usedas required by 'Since'the sides of the pan would be about i .2 feet high, the skating surfaceiwould be' av substantial distance below the .edge ofgthe pit.

to-the bottom whereit may be washed,

cleaned, repainted with white enamel if desired, and. molding or curbing slippedin place between'theedgeofthe pan-and the.

side'of the-pit to form a neatjointx The pit will then be incondition for swimming.

Th-is'take's but. a short timeand only a'small amount oflabor. "The depth ofthe'bottom off the pan including the coils will be a few inches so that the d'epth'of the pit willinotbe' materially decreased for swimming purposes. 7

i The bottom ofthe swimming pool usually slopes lengthwise'sothatthe pool at one end while the other "end 'ismuch deeper. 'If the bottom of-the pit is o'funi fQIHIjSlOPQ throughoutits length and liesin' a single plane, thejfloating plane may be made to rest directly thereon. If the bottom of the pit does notplie' in'a singlepland'asfor instancewhen said bottom slopes in opposite directions towards the center, special. provisions must bemade for supporting the floatingfloor. Q For that purpose, a series of ture, a plate or slab having; detachable sides to form.a"pan,these:sides' being removed,

when the 'plate or slab rests on'the bottom of the pit, and" reconnected'around the edge oftheplate or slab in the winter when it is desiredrto float it. w i i Furthermore, as an important feature,

means are provided'wherebyj the slab, or

plateis sealed around the edges to prevent water frombeing drawn underneath the slab when said slab is atthe bottom of'the pit. This arrangement is 'highly sauiitary'in'asmuch'as it'prevents the formation of stage nant water underneath the slab or plate.

As an important feature of my'invention, my floating floor's'may be constructed so that they may be placed in-swimming pools al-' in the constructions ofthese-pools:

In --the ac cm panying drawiiigs, ltliere tire shown for purposes of,illustratioriy'fvar ous Fig. 52 is a; longitudinal se ctiofi this-@1 5 Fig.4 is a topfplan view somewhat an largdf of one corner of my i ilpi'eved struc- "l of structure 'einUGdyi'f-Ig my invention" and showing a pitand a'flotingfiooithereiril ofpit and showinganbthei ioi'in'df fidzitiiig.

ranged therein to fqr m an Oval Skating rink;

i In the specifie I o'f invention, there isprovidid apit' 10. gMount-I embodying iny 'inventiolf-zind' showing a f inches high;

"pit 10 maybe 0f r'dina -y menstruation :c1'1s'- i j ternary inewimmi igf-pols andma'y"; have} sctioz'ij taken-e51} giie M 6 3 ,fo m a Skating fi i fiVa teiJiIiay bedrjawn "dut' it into "a pesititiiishbwn in fiill i l 'f fs.

a 5L piate l suitablyj fee i forced andhiw Inf the sufrimei, Wlie desired id bettzom WhiCh SI OpGS toward' bne'ien'd n; oppesite kdir'dtibl isYiowai ds a the' ce ter' sloped-30' a: t0; frenderi the pit; 'subs'ig'zintid'ily- ;i deep'atf oneend. Supported on this 11061; 314" is a series; of cqiijfete piers 16 tapered down .wai'dlyj 'tq w'ards the deep end ofkthe pit ia n d e'n'tered atrs'uitable: distances, asfar instance waifdlytbwatdsffhe biherend of the pit and flushing 01 3 similar operapions Format put r pose;theinnerendsbi the eenci etelpiers 'ilfi i 11 and'i'sfia'ccessib'l' from the outside :off the *pit for covering the gap'b t the edgg h 1 1 4 sid'eplate's Ida-11d the side's ef the the floor is in il owered position, so asigbtfmxm a smooth continuousvsurface" betweenncisaid' edges and: sides and to protect the Swimmers against danger of "accidental 7 Contact 1 with saidwedges. ,In "7 'iS'rShO I 8; meldingilfi n detachabl y [connected the ide plats 18 and; curved, int. close proximitytc the sides ra n-j be .pqi tio s wngn v dqttdl in in ii Fig; 2 intdthe positionshownin full lines: to

duitto an outside source of cold brine when edgesof the side plates; from accidental consideof the pit along. the upper; edgethereo ftop .ofnthe pit in case too muchlwater is pumped into the pit. For that purpose, the

' is provided; with a'curb 21 extending .in-

wardlybeyondlthe sides of-thepitand having v v p p and are supported on said plate.- A steel (a recess 22 inthelower surface thereof to receive the upper edge'softhe side plates 13.

1 If desire'd the upperedges of the side' plates I j 13 may be .rolledoutwardlyto form a bead" to reenforee said plates or a half round'bar 23 may be'Weld-ed' or otherwise'connectedto the. I

outsidesof said, edges. v By -means of this construction' it may .not be necessary toprovide a molding between theuedgesof the plates 13and the si'de'of the pitwhen the pan :issnn'k since this edge wouldbe below the therewithi 1 overhanging curb '21 and vsincegthis edge is rounded so that no injurygcairbesustained by a swimmer accidentally coming ii -contact The pan-11 carries refrigerating means in the form of a coil .orla'. conduit whereby. the

layer of Water abOYethepan may be frozen to form an, -ice-skati ng surface. 5 For that purpose, in thespecific 'form shown inFigs. 1-7, there is provided a brinejfeed header 2&

welded or otherwise connected to the bottom of the plate 12 and extending along one side thereof and a brine return header 26 extending' alongthe qopposite side] Connected 'between these headers are a series :of pipes-" 27.

These pipes' maybe ofany size and spaced a sufficient distance'to provide suflic'ient-refrigs feration to'freez-ea laye'rof water above the pan. For instance,'the.pipes may befrom 1 tol inches and .may be mounted on 4 to 4 centers. The refrigerating conduit is connected tothe'bottom oflthe plate by any suitable ineansbut-is advantageously Welded :thereto in order thatthevplatei12 1nay prepipes and headers to saidplate' 12 through p sent a smooth and continuous surface. Such welding maybeeffected by'providing a series of holes in the plates12 and spot Welding the I said holes." 7 1 4 In order. to connect the refrigerating conthe .pan isin ra-ised position, there is provided a vertical pipe 29-connected to the'inlet of the feed header 24 and disposed in a niche30 formed in thepit? 10 to receive said pipe. The upper end of the pipe 29 may detachably' connected to" a brine supply pipe mits slight vertical movement of the floating floor in accordance with the amount of'live load thereon. similar arrangementtifor the outlet ofthe refrigeratingconduit is ems ployed, there being provided, forthat pur h pose, ayertical pipe-31a connected to the out 1 165 l i swi r tu n bade- '2 d e ipipe through a flexible coupling.

In F ig; 8 is shown another way n which the refrigerating pipes and headers may be connected to the' pan 11, -.In .this form, the

brine, feed header 24a andthe brine return header 26a are supported on topfof the plate 12.; Pipes 27a extend betweemthese headers platei31 is mounted on top-of the'pipes 27c betweenthe headers. Theseheaders are -advantageously .enclos edi'n a suitable casing 32' topresent a neat appearance when in lowered I position: In a suitable construction, the

plates 12 and 3 1 would each be about 3- inches while the pipes 27a would be cabout 1 inches, so that the aggregate thickness of the floor of the pan would beabout two inches.

It is seen that the depth of the pit would not i be materiallyvgdecreasedwhen the pan is' in lowered position. I I

-The bottom of the pan llwvill be asubstantial distance below the top-of the pit when serving as a. skating floor, and since the layer of ice above the bottom ofthe pan "would not be more than a fewinches deep, the stratum of cold air above. said layer of ice and be-. tween the sides of thepan' will besubstantial- 1y protected against horizontal hot air-drafts. Furthermore, the sides ofthe pan may serve asa Idasher when the rinkisbeingused for hockey.

.In the summer, when it is desired to, use

the pit 10 for a swimming pool,'the flexible couplings are removed from the pipes 29 and 31a and the ends of thesepipes capped. The I water is then drawn from the pit to lower thepan ll. The pit and pan-may then be cleaned. lTheplate 12 in the construction shown in Figs. 1 7. or-the plate 31 ,in the v construction shown; in F ig.i8, as Well as the side plates 13, Wouldbe painted to match the color ofthesidesofthe pit so that'no I.

visible indication of the pan ispresent when the pit is-used asa' swimming; pool. .The molding: 19could' then be placed around the v In the embodimentshown in Figs. 9-12, the floating floor takes" the form ofa pontoon .34 of sufficient depth to give itproper buoyancy against its dead weight andthe weight of the skaters thereon; For that purpose,1the

pontoon may be about 18 inches highland compr1ses' a bottom plate 35, side plates 36,

and a top. plate 37, spaced below the top edge of theisideplates36- to retain alayer of water i. on said plate 37. The plates 35 and 37 {are suitably connected by brace-members in the form of upstanding angle irons '38.

atingmeans in the form'of aconduit which advantageously includes a brine feed header 39 having connected thereto'a series-of In the interior of said pontoon is refri'ger ,-manheles and 16 and17 atthe bottorn ofthe' pit; 1 If plate 35.1 This brine 'he'ader is connected to a vertical inlet pipe 43 mounted at one, end of i i the pit and ada nectedtt'o a'suppgy tedto be 'detachably coniio'rm shown 17;. ,A sump '44 is. providedfiii the bdttonij of ithe lp'ontoonhaving a connection to abrin'e retunn I; The pentoonis provided nuni'ber of being. shown)-,, whereby-"Water :may be; drawn in' -or: elit Of thGIPODtJOOHQ 1" Inithe operationof this particular typegof floating floor, whenit the "pontoon-wislfilled with water throngh'i'the lowered until. it .rests on .the

fleshed, the wate n may be' r i n ou f th pit .-and= thepontoon lowermost lgposition. The. pit 368 11 tthen: be

- :oleanecl; Washedand pain-tedjiind refilled with water. The pontoonis floodedso that it will remain at the bottom OfgthQPlh; 1

v 'Atkthe end of the summer,whenitflsvdesired to convert the ipit i-nto a-skating ;=r'in k,

Water is qpnmped outr. fromthea interior of this pontoon so as to permittsaidzpontoon ito neat to the mp oi the water" gamn thenpper :edges :01 the side "plates 36 ,e'ngage the- C l1f'b 21o manholes 1 46mm then closed and the layer-of water on top of-the plateB'Z may then be irozen'toiform an,ice-skati-ng s uriace. i In Figs. 13 toil'fiis shownia ferr -not con- ?stnucti'on which is pantieularlyiadapted for The usual type otfsw-imrnln'g use in a swimmingvpool already in {existence to render such a? swimming pool eeriuer'tible :into a skating rink without any substantial t. ohangevin lthhshapefif the pitp I j i p w. l pool has a -floorflivided into-sections having different it slepes so that the pool near one end is sub- =stantial-lg deeper than: at the other end;v "For spi t as slopes:

instance, in

sections 50, 51 1 nd z52 :51 slope "1n opposite directions doW-n' vvandly' towards: a; megion near 'the' left ,end 1' cf the in the same direction as; seotion- -51 buthas a Iidiflerfent grade towards the right [I end of the spool. r 1- of the pit floor. 60,

the -general I type i F :8 although iAs anzim portant feature present invention, the floatlng floori on oi :theiforms -i-s oonstrncted so that when it sis-"disposed inlewenedposition itcdnforms with; the slope For the pnrr poseoi illustratiomwthis feature is shown asizadaipted to of floating the other fohnl's shown. a My improved flo' a-tting -floo-r. -1s-diV1ded into transverse sections l-flexibly connected l together to permit th-em pipe through a suitable v iflexi-ble couplingwas already desoribediwith respect to the in the: ton thereof (only three 7 1:8 arealsodivided:intosectionsythe adjoinhis desired-to usetheipit zf-or-awswinnnin g pool,

cwered to rest ;in its its lowermost position,3 so that 1 Water may Pla e P n P ose h r s? 54 The"ordinary skating"rink; k adapted to be used'ffor" hockey and most Fig; 13 isshown aioommontype wof swimmingpool, the'bottom oit'which coniprises threefsl oping 'havi "g different slopes. zThefsecti-ons 50 .a nd

shown-"in 131g. 13, while thesection 52 1 floor :shorwn :in it may? ;be also adapted 1430' itoi'oon forni with thebot'tom cf the pit. For: i that purpose, there are employed angle-irons 53 extending along the transverse edges of the sections. Adjoining angle irons areoonnected together b'y a stripfl54 40f rubberuorl "other Water-proof materialbe'nt upwardly as .ders. 2241a, and 26a may be similarly dividedqinto. sections corresponding to the sections of the plate 1 2 and ,con- "nected together by suitable fiexiblecouplings toper'mit the'varioussections of the-head below the plate sections 31, (the.

the strip 54 or may beta, separate strip hay- .ingla water-tight --connectiontherewith. I. I

i n. Fig;i 113, t p is pwn'i nti lil ne resting directly: on thefbottonr of; the pit, strips 59. being connected to the bottom of the plate 12 so, th at a sma'll space is pro- Vided between thebottolnof the plate 12 m the bottornyof the ,pitiwhensaid ,pla-tei is in he edges cine pan must ficien-t distance so, that whenthepan is floated into thedotted positionshownlin which all-1; the sections.-,thereo'f [extend a single are pit but will be freejto float.

The sections of the 11 or may be 5' j ed o to p rm he b tak n;

for thawing or 1; cleaning;

them"; F r h c nn e t r ngle" i S a is; i a ly J Q WJS k a -sem a 1M in sh e- Most swimm ng pools} are rectangular' 1n of'.1nvent1onshown'1n shape. the form Figs. 15!;and 161* a rectangularg swimming verted into an;

saidcpit is used as a sjwimmingjpool.

board 56 is mounted, which; extends upward- .ly from the plate 31 to forrnafdasher" surface 57 againstWhich-a hockeypu'ok'maybe hurled and has a flange 1 This -:dasher 'board56 1's deta'chably connect: ed tos-tliepan and extends around :the pitto a ition shown in full lines in'Fig;f"16,a-'dasher 1 ers to slopeat different; anglesr; Thetops of, t

' 'find itssvayinsaid space to Heat, the pa n.

in this position; i be spaced from the sidesof 'the-pit avsufl Will not bind to sides j of p z Y W, b I etectabl I poolalreadyin'egiistance mayfbe easilygc onoval skating j without 7 .irnate'rially changing the "construction; of the pit! Thepit ism-@ is shtwnidithefusuai constructionhaving an overflow channel 5 511 or limiting "the height .Ofl the Water when. 1

Whenthe pan is" heated into misml posimember 58 "Whichh. 'eiztendsoutwardly overthe curb 'ofthe pit. a

form anoval enclosureas shown iniFig; 15.

i The dasher boardfserves to conceal-the v headers 24aqand 26a and covers )the gap between I the sides of the pan and Ethe sides of the l'pitii.

In the,construction shown in Fig. 15, a' space will be left between the corners of'the pit and the dasher board .56. In this space may be inserted a supply pipe 59a and an outlet pipe 60 having detachable connections to the inlet of the feed header 2% and the outlet of the return header 26a respectively,

these pipes being removed in the summer when it is desired to sink the pan, and the open ends of the headers capped. By means of thls construction, no niche need be con flstructed in the pit'to receive the inlet and outlet pipes 59 and 60;

'- Emergency means may be provided to prevent the floating floor from sinkingas the result of excess live loa'd. Such means may gage it in case of excess live load. The flange member 58 may be connected to said angle lronsand supported thereby. Under certain conditions, it may be desirable that the floating-floor when in low-v ered position at the bottom of a swimming pool be rust-proof so that the swimming water does not become contaminated. For-that purpose, there is shown in Figs. 17 and 18 a floor Whichcomprises a concrete slab 65 having onthe bottom thereof a wood sheath- "ing66 and having embedded therein brine pipes 67 extendingbetween headers in a manner already described (brine feed header 67a only being shown).. These headers are also "embedded in "concrete; The concrete above the water.

the pipes, 67 is sufficiently thin so that a layer of Water may be frozen on the slab.' By means of this arrangement, all of the metal .partsof the floor are enclosedinconcrete so that the desired sanitary condition in the swiming pool may be maintained and a better appearing pool bottom effected. I The sheathing 66 preferably has connected underneath the bottom thereof a series of plates orstrips 69 adapted to rest directly on the bottom of the pit, and serving to form a space between the bottom of the slab in.

pit, so that Water may find its way under its lowe1*most"position.and the bottomof the the slab when it is desired to float it. If desired, these strips 69-1nay beprovided with transverse apertures to permit Water to more easily circulate below the slab. e As an important feature ofthe form of plates aredetachably connected to the slabs so thatsthey-may be removed whenthe slab is at the bottom of the pool or may be positioned to form a pan therewith to float it in beddedin the concrete slab 65 along the edges thereof a series of threaded sockets'68. Steel posltion,

F or that purpose, there] is em manently connected at the bottom to angle irons 71. The angle irons 71'aredetachab1y attached around the edges of the slab 65 by any suitable means such as bolts-'72 threaded intothesockets 68. .Interposed between the the bottom of the Pit where said-"bottom'is divided into sections sloping indifferent directions. Also, inaccordance with ihisconstruction, the sections may be floated separately and independently and for that purpose, each section may have detachably mounted transversely thereof between the side plates 7 0, plates 77 having water-proof connections with said side plates 'and the slabs 65 to form pan sections. Both plates 70 and 77 areremoved during-the summer when the slab 65 is resting at the bottom of the pit and are attached in position when it is defloatedand then asuitable strip 78 of rub be'r, copper or' other suitable flexible watersired tofloat the slab. The slab sections are proof material connected "across adjoining ends of the concrete sections. Similar strips are connected across the'gap between ad o1nfin side plates 70. J v I r t is'sometimes desirable that no water he i lodged beneath theplate s or the slabs when at the bottom of the pit, thiswater sometimes becoming stagnant unless certain provisions are made to 'prevent it. As a feature of the construction shown in Fig. 18, means are provided for sealing the edges of: the slab to the sides of the pit-so that no water may find its Way under said slab when in its lowermost position." For that purpose, a concrete strip 80 would be along the sides ofthe 80. The pool may be drained entirely and then the gap between the strip 80'and the provided extendingpit at the bottom. This strip 80 is as high as the aggregate edges of the slab 65 corked or sealed by any suitable-means. In the winter, whenit'is desired to float the is removed, the plates 70 and 77 installed in and the sections floated to the top. The strips 78 are then connected between'the adjoining ends of the slab sections, and simi- I between adjoining endsinvention shown in Figs. 17 and 18, the side the slde plates i i I I the-bottom of the pit and serve asa flo'orfor slab, the corking or sealingv r re said pit when saidqpit is us'edas a swimming wpool orgraised tOR POSItIOII near the top of sa1d pit;t0 serve as a Skfl-t'IIIgiflOOI', and means eanried :bysaid floor forcirculating a ref-rig 5 erant; 1n :heat interchanging relationship therewith to freeze'a layer of water above said floor to forman ice-skating surface. 1

2. A construOt-iOnadapted to be converted into a a swimming pool or a skating rink, includrng'a pitla-rgeenoug hlto serve-as a'swlmming-pool, a'-'fl00r in said pit extending across substantially theentire area-Q01 said pit means tom of-the pitand serves as a floor for said i-pit when said pit is used as :aswi-mm-in'g pool or floated on Water to a positionnearthe top of saidpit to t serveiasq a skating floor, and

means carried by said floor i to a freeze a'layer of water above sa d floor to forman cej-skatingsur'facep v a a a 1 v '3. A eonstruction adapted to be converted into .a swimming pool or a skating rink, in

- elndi-ng a pit large enougli to serve as a swim; mmg, pool, a a pan extending across 1 substan-v tial-ly the entire areaof said ipit,zsaid pan be- ;ing adapted to be sunk at the bottom of the pitvvhensaid pit serves as a swimming pool, and adapted to be floated {on water near the top of said pit'to serve as a skating floor,

er of water in said pan to form an ice-skating surface. l y i 1 a p a: 4. A construction adapted togbe converted 1 into a; swimming pool or a skating rink, in-

ming pool, :a pan extending across substan-v .-,tial-ly the entire area'of said wpit said pan being adapted to. be: sunkat the bottom I of the ,pit when said .pitserves as a swimming ,pookgandxadapted to "be floated on Water vnear the top of {said pit to serve as a/skating ffio or, and a brine conduit disposed adjacent lthebottom of saidlpan and adapted to freeze skating surface. v 5 i j 5. A construction-adapted tobeconverted int-o a swimmin'g pool or-a skating-rink, including *a--pi;t, 1a'rge enough toserve as a l swimming-pool, a pan extending across-sub;

pool a-nd adapted tobe floated-on water near the top of said-pit to serve as a skating floor,

a refrigerating conduit on thebottom of said pan, and a plate covering said conduit and presenting a smooth cont nuous surfaceysaid conduit being adapted to freeze a layer of water Ion top of said plate "to -form an iceskating surface- W1 '6. A construction adapted ito be fconvert ed i'nto swimming pool or a skating rink,

including a pit large enough to serve asa swimming pool, a pan extending across sube I i stantially the entire area of said pitysaid and-means carried by said pan to freeze alay- 9 clu'dingn pit large'enough to serve as a swim.-

a layerroif 'water in said "pan toforman ice- 7 stantially the-entire area of said ,pi-t, said pan being adapted tofbe r sunk to the bottom 1 of the' pit, when said pit serves as a swimming pan being adapted l be'sunk': to" the bottom f oi :theQPit when said pit-serves iaswa :sw'im wining :poolr, and ada pted to be 'floatedmn Waterlnear theftopcoi said pit to serve as a skating floor and refrigerating coils connected l Q to said panxunderneath the/bottom thereof l and. j adapted to freeze a layer of Water in said {pan toform an ice skating, surface.

into a sW'immingpoolor askating rink, rim-" eluding a pit-large enoughzto serve 'as afsWv-m ming pool; a JPOIItOOII: extending across sub 7,

"sta'ntiall y the entirearea of the pity said g p a V pontoon, "ha-vingmopening's therein wherebyf I Water may be "draw 11in oroutwof said 1 pon toon to sinkisaid pontoon to thebottoin of the pitwheni said pitoperates as a swimmingpool or to float saidzp ntoon .near lthe top of said pi ttofform a skatingv fioor, andgnieans 1 1 c'arried by said pontoon for freezinga layer flf of Water on the topiihereofto form anwie'ea 'skatingwsurfajce;

int-0' a swimmingfpool'ror a skatingrink, in-

'ipont'oon r having openings: therein whereby "or 'rep'lacediby 'air to float' said pontoon near the top of said pitto'form a skatingvfloor; and a refrigerating conduit in the interior "0 said pontoon :for freezingi ai layer of water on the top thereof to 'iform I an iee ska'ting surface: m

'9. A constructionadapted to'beconverted" Q i into a swimming pool :or a skatingrink; :includ-ignga'rpit large enoughjto serveasia 'swim- I mingipc-ol, a pontoon eiszten'ding acrossstrb- Sta nti a'ily-th'e entire are a oitthe pitg safifd p'on- 'toorr havingbpenings therein whereby water may be drawn in or I out of said pontoonite sink said pontoon to the- {bottom of the pit when said pit foperates 'as 'afistviinmingpool;

or tor floaft saidpontoonnearlthe top fof sai -d pit to term a skating floor and *aibrine spray device. in said pontoonjadapted' to s spray cold-brine against the interior surface of "the upper portion of (said pontoon-"to ifireeze a layer of water on the top thereof "to roman ice-skating'surface." J g positioned a swimming pool l and "having Ineanstvh'e'reby said flodrlinaybe "sunk sired to use thepool, for swimming or floated were wamptoaster-wisev skating fioogandflineanscarried-by said floor -ezr z a a fiofl l ter ce d r to form an icees'katinglrinkli a i 11. Infcombi'natiom'a panadapted g 'f positioned in a swimmingpoolkandiadaptedifl i 7; A "constriiction adapted tobe'converte'd it a 8;A constructionzadapted to, beconverted -clud-ing a pitlarge enouglzigto rserve 385E190 swimmingxpooka pontoon extendin g faeross j substantially thez ntire areapfithe pit, said lof water above ingirink.

, to be'sunk to the bottom of the pit'to serve' as a swimming floor or floated on water near the top ofthe pool to serveas a skating extending substantially across the entire area of said pit, detachable side plates adapted tofloor, and ail-refrigerating conduitfcarried by said pan to free/ ea layer of water in said pan to form an ic'e skating'surface:

' '12. In Combination, a pontoonadapted to be positioned in a swimming pool and adapted to be sunk to the bottom of the pit to serve 19 as a swimming flooror floated on water near a the top of thepool to-serve assa' skating floor, and a refrigerating conduit inside said pontoon to freeze a layer of water'on the top of said pontoon to form an ice-skating surface. J 13; In combination, a floor adapted to be positioned in a swimmingpool and compri ing auplurality' of sections flexibly connected together whereby said sections maybe made to slope indifferent directions,"said floorbeing adapted to be sunkto the bottom of the pool'and conforinlwith the shape of'the bot tom, or to be floated on water near, the top .of'the pool to serve asaskating floor, and

means carried-bysaidfloor to freeze a layer said. floor toiform an ic'e-,skat

' 14;,A convertibleswimming pool and skating rink, including a pit-large enough to serve as aswimming pool, and having a bottom divided into sections which slope in'dif-' .frentdirections, a floor in said pit extending across substantially the entire area of said pit and adapted to be sunk to the bottomof the pit and serve'as ag fioor for said i pit whensaid pit is used as a swimming pool or floated to a position near the topof said pit to serveas a skati ng-rink,-said floor comprising a plurality of sections corresponding- .,to the section of the pit floor, and having connecting means between said floor [sections to permit said sections to conform with the slope of the pit bottom when said floor is sunk to the bottom of the pit, and to permit said I: floor sections to lie in one plane when floating on water, and means carried bysald floor for I circulating a refrigerant in heat interchanging relationship therewith 'tofreeze alayer of waterabove saidfloor to form an ice-skat- -ing surface. a i

i 15. A convertible swimming-pool and skating rink, including a pit large enough to serve as a swimming pool, a floor in said pit extending across substantially the entire area ofsaid pit, means whereby said floor may be sunk to the bottomvofthepitand serve asa floor for said pit whensaid pit is used as a swimm ng pool, or floated on water to apo-i sition near the "top of said p t to serve'as a skating floor, means for limiting the downward movement of the floor when floated on top of the pit, and means carried by said floor for freezing a layer of water above said floor to form an ice skating surface.-

' 16. A'convertible swimming pool and skat ing rink, including a 'pit'large enough-to serve a swimming pool, a floor in said form a pan therewith x'whenqconnected around the edges thereof, said" floor being adapted to be sunk. in positionat thebottom of the pit when said pit is usedas a swimming pool or floated to a position near the top of said pit to serve as skatingrink when said side plates are connected aroundtheedges thereof, and a refrigerating conduit carried by said floor for' freezing a layerfofwater' thereabove to form an ice-skatlng surface;

17. A "convertible swimming pool" and skating rink, including a .pit large enough to serve'asa swimming pool, a floor in said pit saidsla'b and adapted to freeZe alayer of water on'said slab. v

i 18." A swimming pool adapted to be conto flt in said recess when lowered in its lower verted into a skating rink," and including a":

"pit large enough to serve as a swimming most position. the top of said floor being substantially level with the top of said strip when said'floor is in said position, detachable side plates adapted to form afpan with said floor whereby said floor maybe floated to. or

near the top of said pit to serve as a skating rink, and a refrigerating conduit carried by.

said floor for freezing a'layer of water there- "above to form an ice skating surface.

19. A convertible swimming pool and to serve as a swimming pool, a floor in said pit extending substantially across the' entire no skating rink, including a pit large enough said pit serves as ajswi'mming pool,o'r floated to or'near thetop of the pit toform a skating rink, means for sealing theedge of the .floor to the pit when said floor is in its lowermost position, whereby no water may be admitted between the bottom of said floor and the bottomof said pit when said floor is in said lowermost position,- and a refrigerating conduit carried by said floor for'freezing alaye'r of water thereabove to form-an ice-skating sur-" I TORRANGE; I 

